Cinematographic projector



p 26, 1933- c. E. HlLLERY-COLLINGS 1,928,427

CINEMATOGRAPHIC PROJECTOR Filed Feb. 25, 1932 INVENTOR CHARLES EDWARD HILLERY-COLLINGS BYZZGAQ/ZMQM v65;

ATTORN 5Y5 Patented Sept. 26, 1933 1,928,427

UNITED STATES PATENT OFFICE CINEMATOGRAPHIC PROJECTOR Charles Edward Hillery-Collings, London, England, assignor to Cam Syndicate Limited, London, England, a British company Application February 25, 1932, Serial No. 595,102, and in Great Britain March 16, 1931 2 Claims. (Cl. 8824) This invention relates to cinematographic progage a suitable guide projection formed on the jectors, and especially to lighting means therefor casing. In this clip is lodged a tubular housing of the kind in which a lamp and condenser in a 97, at one end 98 of which is the concave mirror tubular housing are arranged to be attached to known as the radial mirror, and at the other end 5 the projector. 99 of which are the condenser lenses arranged 60 According to the invention the lamp housing is in the usual manner, this housing 97 having an so fitted as to be capable of rocking about its upward extension 100 split at 101 (Figures 1 and longitudinal axis to open and close the electrical 2) to receive the ball 102 which is screwed on to circuit through the lamp. A strip of spring metal the lamp 103 as seen in Figure 6. This extension constituting a part of the electric circuit may be 100 may be tapered and screw threaded with a 65 arranged to engage the central contact of the tapered screw thread and an internally screw lamp in one position of the housing, the circuit threaded clamping ring 104 may be tightened being broken when the housing is rocked into the thereon to secure the lamp socket in the said other position. The portion of the housing extension in a position in which the lamp filawherein the lamp is inserted may be tapered, and ment is opposite the holes 105, 106 (Figures 3 70 is split to facilitate the insertion of the lamp, and 4) in the housing. A pin 107 projects from which is carried in a socket shaped to make a ball the housing 97 through a slot 108 in the casing and socket joint with the housing, and tightened 91, and when this pin is depressed as seen in Figup by means of a clamping ring, which may be ure 1, the lamp contact 109 engages a fixed conscrew threaded to engage the said split and tatact 110 on the casing 91 to close the electrical 75 pered portion, or may be tightened by a suitable circuit and cause light to be emitted from the clamping screw, to hold the lamp in a set position. lamp, but when the pin 107 is pressed up into the The socket can therefore be adjusted to compenposition seen in Figure 2, the housing 97 is theresate for any inaccuracy in the position of the by rocked to break the circuit by taking the lamp p filament, a the p us y be per contact 109 away from the fixed contact 110. 80 forated at both sides opposite the lamp filament, What I claim and desire to secure by Letters to facilitate checking the correctness of the fila- Patent of the United States is: ments position relatively to the usual concave 1, In a cinematographic projector, a casing mirror, y Sighting the fi e t ough b th having a slot in its side, a strip of spring metal perforations. When once adjusted, the tubular on id casin forming a rt of an h t i l 85 hous can a ys b sta y s d Wi circuit, a tubular lamp housing, means on said drawn W h0ut a ect t dju of the casing to carry said housing, said means permitp- In this y t maximum lighting efieet ting angular movement of said housing about its ati y t t Power Of the p is Obtainedaxis, a lamp adjustably carried in said housing In order that the said invention may be clearly d having a, terminal directed at right angles u st od a d re d y c d into effect, the to said axis, a projection on said housing extends me will n w be m r fu y d s i d wi h r ring through said slot and adapted to be actuated n to h acc p nyi r wi w n, to rock said housing about its axis to bring said Figure 1 s a front elevation representing the terminal into and out of contact with said strip,

40 lighting device in its Operative position whereby the electrical circuit through said lamp 95 Figure 2 is a similar view representing the i d d d pened respectively, device rocked into its inoperative position. 2. A cinematographic projector including the Figure 3 is a Side elevation Viewed from t combination, with a casing, of a projecting strip interior of the p ojector. of spring metal on said casing forming part of F u e 4 S a S d elevation 0f t housing an electrical circuit, a tubular lamp housing, 100

tached, viewed'from the side opposite t0 that seen means on aid casing to carry aid housing which i Figure With the Clamping ring detaehedmeans provide for angular movement of said F r 5 i a p r iv v w f a p suit housing about its axis, a lamp in said housing f r Sec t p housing Within the prO- having a terminal normally directed toward said jector casing. strip of spring metal, and means adapted to shift 105 Figure 6 is a representation of the lamp desaid housing upon its axis so as to bring said tached with the ball in section. lamp terminal into and out of contact with said In the drawing, 91 indicates a portion of the strip in order to close and open the electrical cirprojector casing, 92 a clip having a circular opencuit through said lamp respectively. ing 93 and horizontallegs 94, 95 adapted to en- CHARLES EDWARD HILLERY-COLLINGS. 

